.使用异步socket连接，异步解析主机名； 2.支持多文件、多级目录/子目录的上传/下载； 3.文件的删除、重命名、修改属性......等等； 4.用户的修改密码.......等等； 5.断点上传/下载； 6.支持托放上传/下载； 7.自定义FTP命令等； 8.拨号网络(电话及ADSL-. Using asynchronous socket connections, asynchronous to resolve the host name　2. Support multi-file, multi-level directory/subdirectory of the upload/download　3. File delete, rename, modify attributes and so on ......　 4. ....... a user' s password changes, etc.　5. breakpoint upload/download　6. to support drag and drop upload/download　7. custom FTP commands, etc.　8. Dial-Up Networking (tel. and ADSL